Coro/EV/EV.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <stddef.h>
#include <assert.h>
#include <string.h>

#include "EVAPI.h"
#include "../Coro/CoroAPI.h"

static struct ev_prepare scheduler;
static struct ev_idle idler;
static int inhibit;

static void
idle_cb (EV_P_ ev_idle *w, int revents)
{
  ev_idle_stop (EV_A, w);
}

static void
prepare_cb (EV_P_ ev_prepare *w, int revents)
{
  static int incede;

  if (inhibit)
    return;

  ++incede;

  CORO_CEDE_NOTSELF;

  while (CORO_NREADY >= incede && CORO_CEDE)
    ;

  /* if still ready, then we have lower-priority coroutines.
   * poll anyways, but do not block.
   */
  if (CORO_NREADY >= incede)
    {
      if (!ev_is_active (&idler))
        ev_idle_start (EV_A, &idler);
    }
  else
    {
      if (ev_is_active (&idler))
        ev_idle_stop (EV_A, &idler);
    }

  --incede;
}

static void
readyhook (void)
{
  if (!ev_is_active (&idler))
    ev_idle_start (EV_DEFAULT_UC, &idler);
}

/*****************************************************************************/

static void
once_cb (int revents, void *arg)
{
  SV *data = (SV *)arg;

  CORO_READY (data);
  sv_setiv (data, revents);
  SvREFCNT_dec (data);
}

static int
slf_check_once (pTHX_ struct CoroSLF *frame)
{
  SV *data = (SV *)frame->data;

  /* return early when an exception is pending */
  if (CORO_THROW)
    return 0;

  if (SvROK (data))
    return 1; /* repeat until we have been signalled */
  else
    {
      dSP;

      XPUSHs (data);

      PUTBACK;
      return 0;
    }
}

static void
slf_init_timed_io (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  SV *data;

  if (items < 2 || items > 3)
    croak ("Coro::EV::timed_io_once requires exactly two or three parameters, not %d.\n", items);

  data = sv_2mortal (newRV_inc (CORO_CURRENT));
  frame->data    = (void *)data;
  frame->prepare = GCoroAPI->prepare_schedule;
  frame->check   = slf_check_once;

  if (items >= 3)
    SvGETMAGIC (arg [2]);

  ev_once (
    EV_DEFAULT_UC,
    sv_fileno (arg [0]),
    SvIV (arg [1]),
    items >= 3 && SvOK (arg [2]) ? SvNV (arg [2]) : -1.,
    once_cb,
    SvREFCNT_inc (data)
  );
}

static void
slf_init_timer (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  SV *data;
  NV after;

  if (items > 1)
    croak ("Coro::EV::timer_once requires at most one parameter, not %d.\n", items);

  data = sv_2mortal (newRV_inc (CORO_CURRENT));
  frame->data    = (void *)data;
  frame->prepare = GCoroAPI->prepare_schedule;
  frame->check   = slf_check_once;

  after = items ? SvNV (arg [0]) : 0;

  ev_once (
    EV_DEFAULT_UC,
    -1,
    0,
    after >= 0. ? after : 0.,
    once_cb,
    SvREFCNT_inc (data)
  );
}

/*****************************************************************************/

typedef struct
{
  ev_io io;
  ev_timer tw;
  SV *data;
} coro_dir;

typedef struct
{
  coro_dir r, w;
} coro_handle;

static int
handle_free (pTHX_ SV *sv, MAGIC *mg)
{
  coro_handle *data = (coro_handle *)mg->mg_ptr;
  mg->mg_ptr = 0;

  ev_io_stop    (EV_DEFAULT_UC, &data->r.io); ev_io_stop    (EV_DEFAULT_UC, &data->w.io);
  ev_timer_stop (EV_DEFAULT_UC, &data->r.tw); ev_timer_stop (EV_DEFAULT_UC, &data->w.tw);

  return 0;
}

static MGVTBL handle_vtbl = { 0,  0,  0,  0, handle_free };

static void
handle_cb (coro_dir *dir, int success)
{
  ev_io_stop    (EV_DEFAULT_UC, &dir->io);
  ev_timer_stop (EV_DEFAULT_UC, &dir->tw);

  CORO_READY (dir->data);
  sv_setiv (dir->data, success);
}

static void
handle_io_cb (EV_P_ ev_io *w, int revents)
{
  handle_cb ((coro_dir *)(((char *)w) - offsetof (coro_dir, io)), 1);
}

static void
handle_timer_cb (EV_P_ ev_timer *w, int revents)
{
  handle_cb ((coro_dir *)(((char *)w) - offsetof (coro_dir, tw)), 0);
}

static int
slf_check_rw (pTHX_ struct CoroSLF *frame)
{
  SV *data = (SV *)frame->data;

  if (SvROK (data))
    return 1;
  else
    {
      dSP;

      XPUSHs (data);

      PUTBACK;
      return 0;
    }
}

static void
slf_init_rw (pTHX_ struct CoroSLF *frame, SV *arg, int wr)
{
  AV *handle = (AV *)SvRV (arg);
  SV *data_sv = AvARRAY (handle)[5];
  coro_handle *data;
  coro_dir *dir;
  assert (AvFILLp (handle) >= 7);

  if (!SvOK (data_sv))
    {
      int fno = sv_fileno (AvARRAY (handle)[0]);
      data_sv = AvARRAY (handle)[5] = NEWSV (0, sizeof (coro_handle));
      SvPOK_only (data_sv);
      SvREADONLY_on (data_sv);
      data = (coro_handle *)SvPVX (data_sv);
      memset (data, 0, sizeof (coro_handle));

      ev_io_init (&data->r.io, handle_io_cb, fno, EV_READ);
      ev_io_init (&data->w.io, handle_io_cb, fno, EV_WRITE);
      ev_init    (&data->r.tw, handle_timer_cb);
      ev_init    (&data->w.tw, handle_timer_cb);

      sv_magicext (data_sv, 0, PERL_MAGIC_ext, &handle_vtbl, (char *)data, 0);
    }
  else
    data = (coro_handle *)SvPVX (data_sv);

  dir = wr ? &data->w : &data->r;

  if (ev_is_active (&dir->io) || ev_is_active (&dir->tw))
    croak ("recursive invocation of readable_ev or writable_ev");

  dir->data = sv_2mortal (newRV_inc (CORO_CURRENT));

  {
    SV *to = AvARRAY (handle)[2];

    if (SvOK (to))
      {
        ev_timer_set (&dir->tw, 0., SvNV (to));
        ev_timer_again (EV_DEFAULT_UC, &dir->tw);
      }
  }

  ev_io_start (EV_DEFAULT_UC, &dir->io);

  frame->data    = (void *)dir->data;
  frame->prepare = GCoroAPI->prepare_schedule;
  frame->check   = slf_check_rw;
}

static void
slf_init_readable (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  slf_init_rw (aTHX_ frame, arg [0], 0);
}

static void
slf_init_writable (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items)
{
  slf_init_rw (aTHX_ frame, arg [0], 1);
}

/*****************************************************************************/

MODULE = Coro::EV                PACKAGE = Coro::EV

PROTOTYPES: ENABLE

BOOT:
{
        I_EV_API   ("Coro::EV");
        I_CORO_API ("Coro::EV");

        EV_DEFAULT; /* make sure it is initialised */

        ev_prepare_init (&scheduler, prepare_cb);
        ev_set_priority (&scheduler, EV_MINPRI);
        ev_prepare_start (EV_DEFAULT_UC, &scheduler);
        ev_unref (EV_DEFAULT_UC);

        ev_idle_init (&idler, idle_cb);
        ev_set_priority (&idler, EV_MINPRI);

        CORO_READYHOOK = readyhook;
        CORO_READYHOOK (); /* make sure we don't miss previous ready's */
}

void
_loop_oneshot ()
        CODE:
{
        /* inhibit the prepare watcher, as we know we are the only
         * ready coroutine and we don't want it to start an idle watcher
         * just because of the fallback idle coro being of lower priority.
         */
        ++inhibit;

        /* same reasoning as above, make sure it is stopped */
        if (ev_is_active (&idler))
          ev_idle_stop (EV_DEFAULT_UC, &idler);

        ev_loop (EV_DEFAULT_UC, EVLOOP_ONESHOT);

        --inhibit;
}

void
timed_io_once (...)
        PROTOTYPE: $$;$
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timed_io);

void
timer_once (...)
        PROTOTYPE: $
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timer);

void
_poll (...)
        PROTOTYPE:
        CODE:
        CORO_EXECUTE_SLF_XS (slf_init_timer);

void
_readable_ev (...)
        CODE:
        items = 1; /* ignore the remaining args for speed inside Coro::Handle */
        CORO_EXECUTE_SLF_XS (slf_init_readable);

void
_writable_ev (...)
        CODE:
        items = 1; /* ignore the remaining args for speed inside Coro::Handle */
        CORO_EXECUTE_SLF_XS (slf_init_writable);

Revision:	1.27
Committed:	Wed Jul 22 03:02:07 2009 UTC (14 years, 10 months ago) by root
Branch:	MAIN
CVS Tags:	rel-5_161, rel-5_162, rel-5_17
Changes since 1.26:	+6 -0 lines
Log Message:	5.161
#	Content
1	#include "EXTERN.h"
2	#include "perl.h"
3	#include "XSUB.h"
4
5	#include <stddef.h>
6	#include <assert.h>
7	#include <string.h>
8
9	#include "EVAPI.h"
10	#include "../Coro/CoroAPI.h"
11
12	static struct ev_prepare scheduler;
13	static struct ev_idle idler;
14	static int inhibit;
15
16	static void
17	idle_cb (EV_P_ ev_idle *w, int revents)
18	{
19	ev_idle_stop (EV_A, w);
20	}
21
22	static void
23	prepare_cb (EV_P_ ev_prepare *w, int revents)
24	{
25	static int incede;
26
27	if (inhibit)
28	return;
29
30	++incede;
31
32	CORO_CEDE_NOTSELF;
33
34	while (CORO_NREADY >= incede && CORO_CEDE)
35	;
36
37	/* if still ready, then we have lower-priority coroutines.
38	* poll anyways, but do not block.
39	*/
40	if (CORO_NREADY >= incede)
41	{
42	if (!ev_is_active (&idler))
43	ev_idle_start (EV_A, &idler);
44	}
45	else
46	{
47	if (ev_is_active (&idler))
48	ev_idle_stop (EV_A, &idler);
49	}
50
51	--incede;
52	}
53
54	static void
55	readyhook (void)
56	{
57	if (!ev_is_active (&idler))
58	ev_idle_start (EV_DEFAULT_UC, &idler);
59	}
60
61	/*****************************************************************************/
62
63	static void
64	once_cb (int revents, void *arg)
65	{
66	SV data = (SV )arg;
67
68	CORO_READY (data);
69	sv_setiv (data, revents);
70	SvREFCNT_dec (data);
71	}
72
73	static int
74	slf_check_once (pTHX_ struct CoroSLF *frame)
75	{
76	SV data = (SV )frame->data;
77
78	/* return early when an exception is pending */
79	if (CORO_THROW)
80	return 0;
81
82	if (SvROK (data))
83	return 1; /* repeat until we have been signalled */
84	else
85	{
86	dSP;
87
88	XPUSHs (data);
89
90	PUTBACK;
91	return 0;
92	}
93	}
94
95	static void
96	slf_init_timed_io (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
97	{
98	SV *data;
99
100	if (items < 2 \|\| items > 3)
101	croak ("Coro::EV::timed_io_once requires exactly two or three parameters, not %d.\n", items);
102
103	data = sv_2mortal (newRV_inc (CORO_CURRENT));
104	frame->data = (void *)data;
105	frame->prepare = GCoroAPI->prepare_schedule;
106	frame->check = slf_check_once;
107
108	if (items >= 3)
109	SvGETMAGIC (arg [2]);
110
111	ev_once (
112	EV_DEFAULT_UC,
113	sv_fileno (arg [0]),
114	SvIV (arg [1]),
115	items >= 3 && SvOK (arg [2]) ? SvNV (arg [2]) : -1.,
116	once_cb,
117	SvREFCNT_inc (data)
118	);
119	}
120
121	static void
122	slf_init_timer (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
123	{
124	SV *data;
125	NV after;
126
127	if (items > 1)
128	croak ("Coro::EV::timer_once requires at most one parameter, not %d.\n", items);
129
130	data = sv_2mortal (newRV_inc (CORO_CURRENT));
131	frame->data = (void *)data;
132	frame->prepare = GCoroAPI->prepare_schedule;
133	frame->check = slf_check_once;
134
135	after = items ? SvNV (arg [0]) : 0;
136
137	ev_once (
138	EV_DEFAULT_UC,
139	-1,
140	0,
141	after >= 0. ? after : 0.,
142	once_cb,
143	SvREFCNT_inc (data)
144	);
145	}
146
147	/*****************************************************************************/
148
149	typedef struct
150	{
151	ev_io io;
152	ev_timer tw;
153	SV *data;
154	} coro_dir;
155
156	typedef struct
157	{
158	coro_dir r, w;
159	} coro_handle;
160
161	static int
162	handle_free (pTHX_ SV sv, MAGIC mg)
163	{
164	coro_handle data = (coro_handle )mg->mg_ptr;
165	mg->mg_ptr = 0;
166
167	ev_io_stop (EV_DEFAULT_UC, &data->r.io); ev_io_stop (EV_DEFAULT_UC, &data->w.io);
168	ev_timer_stop (EV_DEFAULT_UC, &data->r.tw); ev_timer_stop (EV_DEFAULT_UC, &data->w.tw);
169
170	return 0;
171	}
172
173	static MGVTBL handle_vtbl = { 0, 0, 0, 0, handle_free };
174
175	static void
176	handle_cb (coro_dir *dir, int success)
177	{
178	ev_io_stop (EV_DEFAULT_UC, &dir->io);
179	ev_timer_stop (EV_DEFAULT_UC, &dir->tw);
180
181	CORO_READY (dir->data);
182	sv_setiv (dir->data, success);
183	}
184
185	static void
186	handle_io_cb (EV_P_ ev_io *w, int revents)
187	{
188	handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, io)), 1);
189	}
190
191	static void
192	handle_timer_cb (EV_P_ ev_timer *w, int revents)
193	{
194	handle_cb ((coro_dir )(((char )w) - offsetof (coro_dir, tw)), 0);
195	}
196
197	static int
198	slf_check_rw (pTHX_ struct CoroSLF *frame)
199	{
200	SV data = (SV )frame->data;
201
202	if (SvROK (data))
203	return 1;
204	else
205	{
206	dSP;
207
208	XPUSHs (data);
209
210	PUTBACK;
211	return 0;
212	}
213	}
214
215	static void
216	slf_init_rw (pTHX_ struct CoroSLF frame, SV arg, int wr)
217	{
218	AV handle = (AV )SvRV (arg);
219	SV *data_sv = AvARRAY (handle)[5];
220	coro_handle *data;
221	coro_dir *dir;
222	assert (AvFILLp (handle) >= 7);
223
224	if (!SvOK (data_sv))
225	{
226	int fno = sv_fileno (AvARRAY (handle)[0]);
227	data_sv = AvARRAY (handle)[5] = NEWSV (0, sizeof (coro_handle));
228	SvPOK_only (data_sv);
229	SvREADONLY_on (data_sv);
230	data = (coro_handle *)SvPVX (data_sv);
231	memset (data, 0, sizeof (coro_handle));
232
233	ev_io_init (&data->r.io, handle_io_cb, fno, EV_READ);
234	ev_io_init (&data->w.io, handle_io_cb, fno, EV_WRITE);
235	ev_init (&data->r.tw, handle_timer_cb);
236	ev_init (&data->w.tw, handle_timer_cb);
237
238	sv_magicext (data_sv, 0, PERL_MAGIC_ext, &handle_vtbl, (char *)data, 0);
239	}
240	else
241	data = (coro_handle *)SvPVX (data_sv);
242
243	dir = wr ? &data->w : &data->r;
244
245	if (ev_is_active (&dir->io) \|\| ev_is_active (&dir->tw))
246	croak ("recursive invocation of readable_ev or writable_ev");
247
248	dir->data = sv_2mortal (newRV_inc (CORO_CURRENT));
249
250	{
251	SV *to = AvARRAY (handle)[2];
252
253	if (SvOK (to))
254	{
255	ev_timer_set (&dir->tw, 0., SvNV (to));
256	ev_timer_again (EV_DEFAULT_UC, &dir->tw);
257	}
258	}
259
260	ev_io_start (EV_DEFAULT_UC, &dir->io);
261
262	frame->data = (void *)dir->data;
263	frame->prepare = GCoroAPI->prepare_schedule;
264	frame->check = slf_check_rw;
265	}
266
267	static void
268	slf_init_readable (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
269	{
270	slf_init_rw (aTHX_ frame, arg [0], 0);
271	}
272
273	static void
274	slf_init_writable (pTHX_ struct CoroSLF frame, CV cv, SV **arg, int items)
275	{
276	slf_init_rw (aTHX_ frame, arg [0], 1);
277	}
278
279	/*****************************************************************************/
280
281	MODULE = Coro::EV PACKAGE = Coro::EV
282
283	PROTOTYPES: ENABLE
284
285	BOOT:
286	{
287	I_EV_API ("Coro::EV");
288	I_CORO_API ("Coro::EV");
289
290	EV_DEFAULT; /* make sure it is initialised */
291
292	ev_prepare_init (&scheduler, prepare_cb);
293	ev_set_priority (&scheduler, EV_MINPRI);
294	ev_prepare_start (EV_DEFAULT_UC, &scheduler);
295	ev_unref (EV_DEFAULT_UC);
296
297	ev_idle_init (&idler, idle_cb);
298	ev_set_priority (&idler, EV_MINPRI);
299
300	CORO_READYHOOK = readyhook;
301	CORO_READYHOOK (); /* make sure we don't miss previous ready's */
302	}
303
304	void
305	_loop_oneshot ()
306	CODE:
307	{
308	/* inhibit the prepare watcher, as we know we are the only
309	* ready coroutine and we don't want it to start an idle watcher
310	* just because of the fallback idle coro being of lower priority.
311	*/
312	++inhibit;
313
314	/* same reasoning as above, make sure it is stopped */
315	if (ev_is_active (&idler))
316	ev_idle_stop (EV_DEFAULT_UC, &idler);
317
318	ev_loop (EV_DEFAULT_UC, EVLOOP_ONESHOT);
319
320	--inhibit;
321	}
322
323	void
324	timed_io_once (...)
325	PROTOTYPE: $$;$
326	CODE:
327	CORO_EXECUTE_SLF_XS (slf_init_timed_io);
328
329	void
330	timer_once (...)
331	PROTOTYPE: $
332	CODE:
333	CORO_EXECUTE_SLF_XS (slf_init_timer);
334
335	void
336	_poll (...)
337	PROTOTYPE:
338	CODE:
339	CORO_EXECUTE_SLF_XS (slf_init_timer);
340
341	void
342	_readable_ev (...)
343	CODE:
344	items = 1; /* ignore the remaining args for speed inside Coro::Handle */
345	CORO_EXECUTE_SLF_XS (slf_init_readable);
346
347	void
348	_writable_ev (...)
349	CODE:
350	items = 1; /* ignore the remaining args for speed inside Coro::Handle */
351	CORO_EXECUTE_SLF_XS (slf_init_writable);
352